Identifying Igneous Rocks
Igneous rocks are one of the three main classifications of rocks, and they are formed both above and below ground. Learn about the intrusive and coarse-grained nature of igneous rocks with help from a lab manager and research scientist in this free video...
Igneous rock or magmatic rock, is one of the three main rock types, the others
being sedimentary and metamorphic. Igneous rock is formed through the cooling
Photographs and descriptions of intrusive and extrusive igneous rocks with links
to detailed articles by Geology.com.
Enjoy our igneous rock facts for kids. Find interesting information and a range of
examples that help explain what igneous rocks are and what makes them ...
Get information, facts, and pictures about Igneous rocks at Encyclopedia.com.
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Igneous rocks that form deep within the Earth's crust where temperatures are very
high might take thousands of years to cool down. This causes the crystals to ...
Igneous rocks are formed by solidification of cooled magma (molten rock) either
below (plutonic) or above (volcanic) the surface of the earth. The magma ...
Intrusive, or plutonic, igneous rocks form when magma cools slowly below the
Earth's surface. Most intrusive rocks have large, well-formed crystals. Examples ...
Igneous rocks are classified according to their mineral content: ... Intermediate
rocks are roughly even mixtures of felsic minerals (mainly plagioclase) and mafic
Igneous Rocks. There are places on Earth that are so hot that rocks melt to form
magma. Because magma is liquid and usually less dense than surrounding ...